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Excitation of Azimuthal Modes in an Axisymmetric Jet

  • R. A. Petersen
  • M. M. Samet
  • T. A. Long
Conference paper
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Summary

Low order azimuthal modes of jet instability are introduced acoustically using an azimuthal array of speakers. The evolution of axisymmetric and helical instabilities, excited at the frequency of the preferred mode, are mapped along the potential core region. The amplification of the axisymmetric mode is much stronger than the helical mode and the agreement between phase locked measurements and stability predictions is much better. Phase-locked measurements of the helical instability show evidence of resonant interaction with other azimuthal modes.

Keywords

Radial Profile Prefer Mode Momentum Thickness Spectral Distortion Azimuthal Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • R. A. Petersen
    • 1
  • M. M. Samet
    • 1
  • T. A. Long
    • 1
  1. 1.Department of Aerospace and Mechanical EngineeringUniversity of ArizonaTucsonUSA

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